Heat dissipation device

ABSTRACT

A heat dissipation device includes a plurality of fins connected to each other. Each fin includes a plate and a pair of flanges extending from the plate. Each flange includes a first section extending perpendicularly away from the plate, a third section extending perpendicularly towards the plate and a second section interconnecting the first section and the third section. The first section is parallel to the third section and the second section is parallel to the plate. Three channels are defined by the first flange, the second flange and the plate for allowing airflow to flow through the fins.

BACKGROUND

1. Technical Field

The present disclosure relates to heat dissipation devices, and moreparticularly, to a heat dissipation device having large heat dissipationareas.

2. Description of Related Art

Electronic components generate a large amount of heat in operationthereof. Therefore, heat dissipation, often in a form of device, isrequired for the electronic components. As shown in FIG. 1, a typicalheat dissipation device 90 includes a plurality of fins fixed to eachother. The fins each have a planar shape with two flanges locked withthat of an adjacent fin. A plurality of channels are defined betweenadjacent fins for allowing airflow to flow through the fins.

However, the heat dissipation areas of the typical heat dissipationdevice 90 are limited, and cannot meet heat dissipation requirement ofhigh power electronic components.

What is needed, therefore, is a heat dissipation device which canovercome the limitations described above.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present disclosure can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the views.

FIG. 1 is a side view of a conventional heat dissipation device.

FIG. 2 is an isometric view of a heat dissipation device in accordancewith a first embodiment of the present disclosure.

FIG. 3 is an enlarged view of a fin of the heat dissipation device ofFIG. 2.

FIG. 4 is a side view of the fin of FIG. 3.

FIG. 5 is a side view of the heat dissipation device of FIG. 2.

FIG. 6 is a side view of a fin of a heat dissipation device inaccordance with a second embodiment of the present disclosure.

FIG. 7 is a side view of a fin of a heat dissipation device inaccordance with a third embodiment of the present disclosure.

DETAILED DESCRIPTION

Referring to FIGS. 2-3, a heat dissipation device 10 in accordance witha first embodiment of the present disclosure is shown. The heatdissipation device 10 includes a plurality of fins 20 connected to eachother along a lateral direction.

Also referring to FIGS. 4-5, each fin 20 includes a plate 30 and a pairof flanges 210, 220 extending from two opposite ends of the plate 30,respectively. The plate 30 is planar and extended along a verticaldirection. The plate 30 has a rectangular shape with an upper cornerbeing cut away. The plate 30 has a top side 312, a bottom side 313parallel to the top side 312, a right side 315 interconnecting rightends of the top side 312 and the bottom side 313, an inclined side 310extending downwardly from a left end of the top side 312, and a leftside 314 extending upwardly from a left end of the bottom side 313 andconnecting the inclined side 310 at a joint 311. The two flanges 210,220 are similar to each other, each including a first section 211, 221perpendicular to the plate 30, a second section 212, 222 perpendicularto the first section 211, 221 and parallel to the plate 30, and a thirdsection 213, 223 perpendicular to the second section 212, 222 andparallel to the first section 211, 221. The first sections 211, 221 andthe third sections 213, 223 of the upper flange 210 and the lower flange220 have the same width. The second section 212 of the upper flange 210has a height smaller than the second section 222 of the lower flange220. The lengths of the first section 211, the second section 212 andthe third section 213 of the upper flange 210 along an extendingdirection of the top side 312 are less than that of the lower flange220, respectively. The first section 211 of the upper flange 210 extendsfrom the top side 312 of the plate 30, the second section 212 of theupper flange 210 is bended downwardly from a front end of the firstsection 211, and the third section 213 of the upper flange 210 is bendedinwardly from a bottom end of the second section 212 and fixed to theplate 30. The first section 221 of the lower flange 220 extends from thebottom side 313 of the plate 30, the second section 222 of the lowerflange 220 is bended upwardly from a front end of the first section 221,and the third section 223 of the lower flange 220 is bended horizontallyand inwardly from a top end of the second section 220 and connected tothe plate 30. The two flanges 210, 220 are fixed to the plate 30 bysoldering or other suitable methods. The two flanges 210, 220 and theplate 30 can also be integrally made from one piece of metal sheet.

The upper flange 210 encloses an upper channel 41 together with theplate 30, the lower flange 220 encloses a lower channel 42 together withthe plate 30, and the third sections 213, 223 of the upper flange 210and the lower flange 220 define a middle channel 43 together with theplate 30. The upper channel 41 has an inner size smaller than that ofthe lower channel 42 so that more airflow can flow through the lowerchannel 42. The upper channel 41, the middle channel 43 and the lowerchannel 42 provide different pathways for the airflow flowing throughthe fins 20. The upper channel 41 and the lower channel 42 has a rightopening flush with the right side 315 of the plate 30, and a leftopening spaced a distance from the inclined side 310 and the left side314 of the plate 30, respectively. That is to say, the upper channel 41and the lower channel 42 are terminated within a periphery range of theplate 30. Therefore, the airflow flowing out of the left openings of theupper channel 41 and the lower channel 42 can disturb with the airflowflowing through the middle channel 43 at a left area of the plate 30,thereby increasing heat exchange with the plate 30.

FIG. 6 shows a fin 20 a of a heat dissipation device in accordance witha second embodiment of the present disclosure. The fin 20 a includes aplate 30 a and a pair of flanges 210 a, 220 a each including a firstsection 211 a, 221 a, a second section 212 a, 222 a and a third section213 a, 223 a. The plate 30 a of this embodiment has a configuration sameas that of the plate 30 of the first embodiment, and the flanges 210 a,220 a of this embodiment have configurations same as that of the flanges210, 220 of the first embodiment except the third sections 213 a, 223 a.In this embodiment, the third sections 213 a, 223 a of the upper flange210 a and the lower flange 220 a are spaced from the plate 30 a, twogaps are defined between the plate 30 a and corresponding distal ends ofthe third sections 213 a, 223 a, so that the upper channel 41 a and thelower channel 42 a communicate with the middle channel 43 a via the gapsall over the length thereof. The upper flange 210 a and the lower flange220 a are directly bended from the plate 30 a.

FIG. 7 shows a fin 20 b in accordance with a third embodiment of thepresent disclosure. Different from the first embodiment and the secondembodiment, the upper flange 210 b and the lower flange 220 b of thisembodiment each only include the first section 211 b, 221 b, and theplate 30 b further forms a middle flange 230 b which includes a firstsection 231 b, a second section 232 b and a third section 233 b. Thefirst section 231 b and the third section 233 b of the middle flange 230b are perpendicularly connected to the plate 30 b, and the secondsection 232 b of the middle flange 230 b is connected to the firstsection 231 b and the third section 233 b and parallel to the plate 30b. The first sections 211 b, 231 b of the upper flange 210 b and themiddle flange 230 b and the plate 30 b cooperatively define an upperchannel 41 b, the middle flange 230 b and the plate 30 b cooperativelyenclose a middle channel 43 b, and the first section 221 b of the lowerflange 220 b, the third section 233 b of the middle flange 230 b and theplate 30 b cooperatively define a lower channel 42 b. The upper channel41 b, the middle channel 43 b and the lower channel 42 b are separatedfrom each other along the length thereof. The upper flange 210 b and thelower flange 220 b are directly bended from the plate 30 b, and themiddle flange 230 b is fixed to the plate 30 b by soldering or othersuitable methods.

According to the foresaid embodiments, the flanges 210, 210 a, 210 b ofthe fins 20, 20 a, 20 b each have a plurality of parts non-coplanar witheach other. So, the fins 20, 20 a, 20 b of the heat dissipation device10 have large areas by increasing the areas of the flanges 210, 210 a,210 b, 220, 220 a, 220 b, 230 b, whereby the heat dissipation capacityof the heat dissipation device 10 is enhanced.

It is believed that the present embodiments will be understood from theforegoing description, and it will be apparent that various changes maybe made thereto without departing from the spirit and scope of thepresent disclosure or sacrificing all of its material advantages, theexamples hereinbefore described merely being preferred or exemplaryembodiments.

1. A heat dissipation device comprising: a plurality of fins, each ofthe fins comprising: a plate; and a first flange comprising a firstsection extending from the plate along a direction away from the plate,a third section extending along a direction towards the plate, and asecond section interconnecting the first section and the second section,the first section, the second section and the third section arenon-coplanar with each other.
 2. The heat dissipation device of claim 1,wherein the first section is perpendicular to the plate.
 3. The heatdissipation device of claim 2, wherein the second section is parallel tothe plate.
 4. The heat dissipation device of claim 2, wherein the thirdsection is parallel to the first section.
 5. The heat dissipation deviceof claim 1, wherein the each of the fins further comprises a secondflange extending from the plate, the second flange comprising a firstsection extending away from the plate, a third section extending towardsthe plate and a second section interconnecting the first section and thesecond section.
 6. The heat dissipation device of claim 5, wherein thefirst section of the second flange is parallel to the first section ofthe first flange, the second section of the second flange is parallel tothe second section of the first flange, and the third section of thesecond flange is parallel to the third section of the first flange. 7.The heat dissipation device of claim 5, wherein the first flange isextended from a top side of the plate, and the second flange is extendedfrom a bottom side of the plate.
 8. The heat dissipation device of claim7, wherein the first flange and the plate enclose a first channel, thesecond flange and the plate enclose a second channel, and the thirdsections of the first flange and the second flange and the platecooperatively define a third channel.
 9. The heat dissipation device ofclaim 8, wherein the third channel is located between the first channeland the second channel.
 10. The heat dissipation device of claim 8,wherein the second channel has a length more than that of the firstchannel.
 11. The heat dissipation device of claim 8, wherein the secondchannel has a width more than that of the first channel.
 12. The heatdissipation device of claim 8, wherein the third sections of the firstflange and the second flange are directly connected to the plate so thatthe first channel, the second channel and the third channel areseparated from each other along the length thereof.
 13. The heatdissipation device of claim 8, wherein the third sections of the firstflange, the second flange are spaced gaps from the plate so that thefirst channel, the second channel and the third channel communicate witheach other along length thereof.
 14. The heat dissipation device ofclaim 8, wherein the first channel and the second channel are terminatedwithin a periphery range of the plate so that airflow flowing out of thefirst channel and the second channel disturb with airflow flowingthrough the third channel at a place within the periphery range of theplate.
 15. The heat dissipation device of claim 14, wherein the firstchannel and the second channel have first openings flush with a lateralside of the plate, and second openings spaced intervals from an oppositelateral side of the plate.
 16. The heat dissipation device of claim 1,wherein each of the fins further comprises a second flange and a thirdflange, the second flange and the third flange are respectively locatedat a top side and a bottom side of the plate and the first flange islocated at a middle of the plate.
 17. The heat dissipation device ofclaim 16, wherein each of the second flange and the third flangecomprises a first section parallel to the first section of the firstflange.
 18. The heat dissipation device of claim 17, wherein the firstsections of the first flange and the second flange and the platecooperatively define a first channel, the first section of the thirdflange and the third section of the first flange and the platecooperatively define a second channel, and the first flange and theplate cooperatively enclose a third channel.
 19. The heat dissipationdevice of claim 18, wherein first channel, the second channel and thethird channel are separated from each other along the length thereof.20. The heat dissipation device of claim 18, wherein the third channelis located between the first channel and the second channel.